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8603 Dental

A male 25 years old presents to the dental clinic with black spot .He also gives the history of previous dental treatments of other teeth as well . Intraoral examination reveals pit and fissure caries with 17. The alignment of the rotary instrument shank axis in this patient should be:

AParallel with the long axis of the tooth crown
BPerpendicular to the long axis of the tooth crown
CParallel to the transverse axis of the tooth crown
DPerpendicular to the transverse axis of the tooth crown
Dental
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8604 Dental

During root canal instrumentation, the apical constriction is violated and enlarged to a size no. 50 instrument, which of the following is appropriate treatment for this canal:

AObturate with gutta-percha and surgically remove extruded excess
BFit a No.50 gutta-percha cone with sealer and carefully condense
CFit a No.50 gutta-percha cone with sealer but don't condense so as to keep the G.P. from being pushed into the foramen
DReinstrument 1 mm short of the foramen to a size No.60 or larger and obturate using an appropriately sized master cone
Dental
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